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May 23rd, 2019
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  1. conexion.Open();
  2. OleDbCommand command = new OleDbCommand();
  3. command.Connection = conexion;
  4. command.CommandText = "select * from tabla where columnaUsuario='" + usuario.Text + "'and contrasena='" + contrasena.Text + "'";
  5. OleDbDataReader reader = command.ExecuteReader();
  6. int count = 0;
  7. while (reader.Read())
  8. {
  9. count++;
  10. }
  11. if (count == 1)
  12. {
  13. MessageBox.Show("Guillermo genio ");
  14. conexion.Close();
  15. this.Hide();
  16. Form1 form = new Form1();
  17. form.ShowDialog();
  18. }
  19.  
  20. else
  21. {
  22. MessageBox.Show("Guillermo genio te equivocaste, intenta de nuevo");
  23. }
  24. conexion.Close();
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